Cited by 221Angiogenesis and VEGF in CancerBarrier Structure and Function StudiesNeurological Disease Mechanisms and Treatments

VEGF overexpression induces post-ischaemic neuroprotection, but facilitates haemodynamic steal phenomena

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Wang, Y.·2004·Brain

Abstract

Therapeutic angiogenesis with vascular endothelial growth factor (VEGF) is a clinically promising strategy in ischaemic disease. The pathophysiological consequences of enhanced vessel formation, however, are poorly understood. We established mice overexpressing human VEGF165 under a neuron-specific promoter, which exhibited an increased density of brain vessels under physiological conditions and enhanced angiogenesis after brain ischaemia. Following transient intraluminal middle cerebral artery (MCA) occlusions, VEGF overexpression significantly alleviated neurological deficits and infarct volume, and reduced disseminated neuronal injury and caspase-3 activity, confirming earlier observations that VEGF has neuroprotective properties. Brain swelling was not influenced in VEGF-overexpressing animals, while sodium fluorescein extravasation was moderately increased, suggesting that VEGF induces a mild blood-brain barrier leakage. To elucidate whether enhanced angiogenesis improves regional cerebral blood flow in the ischaemic brain, [14C]iodoantipyrine autoradiography was performed. Autoradiographies revealed that VEGF induces haemodynamic steal phenomena with reduced blood flow in ischaemic areas and increased flow values only outside the MCA territory. Our data demonstrate that VEGF protects neurons from ischaemic cell death by a direct action rather than by promoting angiogenesis, and suggest that strategies aiming at increasing vascular density in the whole brain, e.g. by VEGF overexpression, may worsen rather than improve cerebral haemodynamics after stroke.

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  1. Bruick RK, McKnight SL. Building better vasculature. Genes Dev 2001; 15: 2497-502.

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Authors
Wang, Y.
Affiliations
University of Zurich (CH)
Corresponding author
Wang, Y.
Venue
Brain
Published
2004-11-17
Volume
128
Issue
1
Pages
52-63
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
OpenAlex
W2166050160
Cited by
221
References
55
Citations by year
2026: 2 · 2025: 5 · 2024: 4 · 2023: 5 · 2022: 5 · 2021: 10 · 2020: 10 · 2019: 8 · 2018: 9 · 2017: 7 · 2016: 14 · 2015: 5 · 2014: 16 · 2013: 20 · 2012: 12
FWCI
5.21
Type
journal article
Language
en
Open access
Locations
  • Brain (publishedVersion)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, other-oa)
  • reroDoc Digital Library (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
  • National Science Foundation
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (67256, 100790, 3200B0)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Angiogenesis and VEGF in Cancer
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
VEGF overexpression, therapeutic angiogenesis, cerebral ischemia, neuroprotection, regional cerebral blood flow, middle cerebral artery occlusion, blood-brain barrier disruption, neuronal injury, caspase-3, stroke, VEGF165, cerebral angiogenesis
MeSH terms
Animals, Blood-Brain Barrier, Brain, Capillaries, Capillary Permeability, Brain Ischemia, Cerebrovascular Circulation, Hemodynamics, Humans, Mice, Transgenic, Necrosis, Neovascularization, Pathologic, Neurons, Stroke, Middle Cerebral Artery, Vascular Endothelial Growth Factor A, Mice

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